<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/mumu.png" alt="mumu">
        <span>木木后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区 -->
    <el-container>
      <!-- 左边侧边栏 -->
      <el-aside :width="menuWidth">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区 -->
        <el-menu background-color="#333744" text-color="#eee" active-text-color="#409EFF" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveMenuActiveState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标  -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'Home',
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      menuWidth: '200px',
      // 是否激活按钮
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: result } = await this.$http.get('menus')
      // console.log(result)
      if (result.meta.status !== 200) return this.$message.error(result.meta.msg)
      this.menuList = result.data
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
      this.menuWidth = this.isCollapse ? '64px' : '200px'
    },
    saveMenuActiveState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-container{
    height: 100%;
  }

  .el-header{
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    font-size: 20px;
    color: #eeeeee;
    background-color: #373D41;

    > div {
      display: flex;
      align-items: center;

      span{
        margin-left: 15px;
      }
    }

    img{
      height: 50px;
    }
  }

  .el-aside{
    .el-menu{
      border-right: none;
    }
    background-color: #333744;
  }

  .el-main{
    background-color: #eaedf1;
  }

  .iconfont{
    padding-right: 10px;
  }

  .toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #eeeeee;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
